Dry and wet segmented rotating shaft

Abstract

The dry-wet segmented rotating shaft comprises a rotating shaft body and is characterized in that the rotating shaft body is rotationally sleeved with a shaft sleeve, clamping bases are annularly arranged at the two ends of the shaft sleeve in a protruding mode, the clamping bases are arranged in a double-offset mode, a spiral groove is spirally formed in the inner wall of the shaft sleeve, and a backflow groove is formed in the position, corresponding to the spiral groove, of the clamping base at one end of the shaft sleeve. And the backflow groove is communicated with the spiral groove. The backflow groove is formed in the mode that the edge of the clamping base at one end of the backflow groove is in a semi-notch shape, the notch is in an inverted trapezoid shape, the two shaft sleeves are arranged oppositely and connected, a backing ring is arranged between the two shaft sleeves, openings in the two ends of the backing ring are in a horn shape, and mesh-shaped hollowed-out parts are formed in the peripheral wall of the backing ring. According to the structure, the two shaft sleeves are oppositely and intermittently connected with the shaft through liquid, dry-wet separation of the rotating shaft is achieved, and meanwhile the heat dissipation efficiency of the rotating shaft and the shaft sleeves is improved.

Description

Technical Field

[0001] The present invention relates to the field of magnetic pumps, and in particular to a dry-wet segmented rotating shaft for a magnetic pump. Background Art

[0002] The characteristic of a magnetic pump is that the motor and the pump body are magnetically driven through non-mechanical direct contact. In the pump body, a graphite shaft sleeve is provided between the rotating shafts of the impellers to achieve stable rotation drive of the rotating shaft, and the graphite shaft sleeve is not completely sealed. When the pump is working, the flowing liquid flows through the graphite shaft sleeve without being blocked. And the inner walls of the existing graphite shaft sleeves are all designed with some grooves, but these grooves only play the role of reducing the stress of thermal expansion and contraction. For the rotating shaft end at the liquid end with greater resistance, it does not have the effect of enhancing the cooling of the rotating shaft, and at the same time, it will cause another kind of resistance to the inflow of the fluid. Moreover, the inflow of the liquid will also have a certain impact on the magnetic drive structure of the magnetic pump, affecting the usability of the overall magnetic pump. Therefore, we propose a dry-wet segmented rotating shaft for a magnetic pump based on the shaft sleeve structure. Summary of the Invention

[0003] A dry-wet segmented rotating shaft for a magnetic pump based on the shaft sleeve structure proposed by the present invention optimizes the existing magnetic pump shaft sleeve and the overall usability of the magnetic pump. To achieve the above object, the present invention adopts the following technical solutions:

[0004] A dry-wet segmented rotating shaft includes a rotating shaft. It is characterized in that the rotating shaft is rotatably sleeved with a shaft sleeve. Both ends of the shaft sleeve are annularly protruded with clamping seats, and the clamping seats are arranged with double offsets. The inner wall of the shaft sleeve is spirally provided with spiral grooves, and a return groove is opened in the clamping seat at one end of the shaft sleeve corresponding to the spiral groove, and the return groove is communicated with the spiral groove. The return groove is provided with a semi-notch along the edge of one end clamping seat, and the notch is provided in an inverted trapezoid shape and is arranged at intervals in a circular shape along the edge. Such a setting enables the fluid to be partially introduced into the spiral groove in sequence according to the notch, and will not flow in with a large impulse, avoiding causing another rotational resistance force, and at the same time achieving effective introduction of part of the liquid for heat dissipation.

[0005] There are two shaft sleeves, which are arranged oppositely and connected. A gasket ring is arranged between the two shaft sleeves. Both ends of the gasket ring are opened in a trumpet shape, and the outer peripheral wall of the gasket ring is provided with a mesh-shaped hollow. The gasket ring has two functions. One is to block the flow of the fluid inside one end shaft sleeve, and the second is to indirectly connect the two end shaft sleeves.

[0006] Preferably, multiple groups of the spiral grooves are annularly arranged in an array on the shaft sleeve, and the groove shape of the spiral groove is U-shaped. The spiral directions of the spiral grooves between the two groups of shaft sleeves are opposite. This further prevents the liquid in the grooves from communicating with each other and increases the heat dissipation area. The shaft sleeve is made of graphite material.

[0007] It includes an impeller and a motor. The impeller is externally sleeved with a pump casing, and one end of the pump casing away from the feed port is connected to an outer casing. An inner casing is sleeved inside the outer casing. The impeller is provided with a rotating shaft along its axial direction, and the rotating shaft is rotatably sleeved with a shaft sleeve in the inner section of the inner casing. There are two shaft sleeves, which are arranged facing each other and connected. A spacer ring is arranged between the two shaft sleeves. The end of the rotating shaft is connected to an inner rotating cylinder. Inner magnetic blocks are fixedly attached to the outer wall of the inner rotating cylinder. An outer rotating cylinder is sleeved between the inner casing and the outer casing. Outer magnetic blocks are fixedly attached to the inner wall of the outer rotating cylinder. The output end of the motor penetrates the outer casing and is coaxially connected to the outer rotating cylinder. The inner magnetic blocks and the outer magnetic blocks are correspondingly adsorbed. The motor drives the outer magnetic blocks fixedly attached to the inner wall of the outer rotating cylinder to rotate, thereby driving the inner magnetic blocks to rotate, and then driving the rotating shaft and the impeller to rotate in sequence.

[0008] Preferably, the inner rotating cylinder and the rotating shaft are coaxially arranged, and the inner magnetic blocks and the outer magnetic blocks are annularly arrayed about the rotating shaft.

[0009] Preferably, the pump casing, the outer casing and the inner casing are all made of non-magnetic stainless steel.

[0010] The beneficial effects of the present invention are as follows:

[0011] For the shaft sleeve of the magnetic pump with the structure of the present invention, one end is provided with a ring-shaped return groove structure. During use, the ring-shaped clamping seat end is used to connect with the component close to the fluid, so that the fluid can flow in in a guiding manner through the notch part, and will not flow in with a large impulse, avoiding causing another rotational resistance force. At the same time, by using the frictional force between the rotating shaft and a part of the fluid with a guiding flow pattern, the fluid is brought into the spiral groove. The spiral groove enables the fluid attached layer rotating with the rotating shaft to move axially along the shaft sleeve, and finally reaches a back-and-forth cycle through the return groove and the rotating shaft. The fluid driven by the impeller continuously circulates between the shaft sleeve and the rotating shaft at one end, so that the shaft sleeve not only realizes the fixing function of the shaft, but also realizes the heat dissipation efficiency of the rotating shaft and the shaft sleeve; the overall of the two shaft sleeves arranged facing each other and connected by a spacer ring effectively blocks the fluid inside one end of the shaft sleeve, and is also the fixed connection of different sections of the two shaft sections, enabling the rotating shaft to be completely dry and wet segmented.

[0012] The present invention adopts the structural setting of a double shaft sleeve facing each other and intermittently connecting the liquid shaft, which optimizes the working conditions of fixing and heat dissipation of the rotating shaft and the shaft sleeve, and further increases the dry and wet separation of the shaft section inside the pump. One shaft sleeve uses a very small part of the flowing liquid for cooling, avoiding the high temperature caused by friction, and at the same time avoiding the complete inflow of the liquid from affecting the magnetic drive effect. The other shaft sleeve can also achieve cooling by using the rotating wind speed of the magnetic drive. The use of the two shaft sleeves plays a role in stabilizing the rotation, effectively dissipating heat, and realizing a completely dry and wet separation section for the rotating shaft of the magnetic pump. The overall structure greatly enhances the use of the magnetic pump. Description of the Drawings

[0013] Figure 1Schematic structural diagram of the shaft sleeve of the present invention.

[0014] Figure 2 Schematic structural diagram of the magnetic pump of the present invention.

[0015] Figure 3 Cross-sectional view of the structure of the magnetic pump of the present invention.

[0016] Figure 4 Schematic structural diagram of the assembly of the impeller and the shaft sleeve of the present invention.

[0017] Figure 5 Cross-sectional view of the assembly structure of the shaft sleeve and the gasket ring of the present invention.

[0018] Reference numerals in the figure: 1, shaft sleeve; 101, clamping seat; 102, spiral groove; 103, return groove; 2, outer shell; 201, pump housing; 202, inner shell; 203, spacer fixing block; 3, impeller; 301, rotating shaft; 302, gasket ring; 303, inner rotating cylinder; 304, inner magnetic block; 4, motor; 401, outer rotating cylinder; 402, outer magnetic block. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Refer to Figures 1-5 , a dry-wet segmented rotating shaft, including a rotating shaft 301, the rotating shaft 301 is rotatably sleeved with a shaft sleeve 1, both ends of the shaft sleeve 1 are annularly protruded with clamping seats 101, and the clamping seats 101 are arranged with double offsets. The inner wall of the shaft sleeve 1 is spirally provided with a spiral groove 102, and a return groove 103 is opened in the clamping seat 101 at one end of the shaft sleeve 1 corresponding to the spiral groove 102. The return groove 103 is communicated with the spiral groove 102. The return groove 103 is arranged in a semi-notch shape along the edge of one end clamping seat 101, and the notch is arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge. With this structural arrangement, when used in a pump, the ring-shaped clamping seat 101 end is connected to the component close to the fluid, so that the fluid part can be introduced in a guiding manner through the notch part, and will not flow in with a large impulse, avoiding causing another rotational resistance force, and at the same time effectively guiding it into the inside of the sleeve body and dissipating heat from the shaft part.

[0021] The notch is designed to be arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge, which is also beneficial to the stable connection with other components.

[0022] It is also a magnetic pump with a bushing, including an impeller 3 and a motor 4. The impeller 3 is externally sleeved with a pump casing 202, and one end of the pump casing 202 away from the feed port is connected to a housing 2. An inner housing 201 is sleeved inside the housing 2. The impeller 3 is axially provided with a rotating shaft 301, and the rotating shaft 301 is rotatably sleeved with a bushing 1 in the inner section of the inner housing 201. There are two bushings 1, which are arranged oppositely and connected. A spacer ring 302 is arranged between the two bushings 1. The end of the rotating shaft 301 is connected to an inner rotating cylinder 303. An inner magnetic block 304 is fixedly attached to the outer wall of the inner rotating cylinder 303. An outer rotating cylinder 401 is sleeved between the inner housing 201 and the housing 1. An outer magnetic block 402 is fixedly attached to the inner wall of the outer rotating cylinder 401. The output end of the motor 4 penetrates through the housing 2 and is coaxially connected to the outer rotating cylinder 401. The inner magnetic block 304 and the outer magnetic block 402 are correspondingly adsorbed.

[0023] The inner rotating cylinder 303 and the rotating shaft 301 are coaxially arranged. The inner magnetic block 304 and the outer magnetic block 402 correspond to each other, and the inner magnetic block 304 and the outer magnetic block 402 are annularly arrayed about the rotating shaft 301. Through the magnetic force between the outer magnetic block 402 and the inner magnetic block 304, the motor 4 drives the rotating shaft 301 and the impeller 3 to rotate. That is, the motor 4 drives the outer magnetic block 402 fixedly attached to the inner wall of the outer rotating cylinder 401 to rotate, thereby driving the corresponding inner magnetic block 304 to rotate, and then driving the rotating shaft 301 and the impeller 3 to rotate in sequence.

[0024] Reference Figure 3 and Figure 5 For the magnetic pump, there are two bushings 1, which are arranged oppositely and connected. A spacer ring 302 is arranged between the two bushings 1. The two ends of the spacer ring 302 are open and in a trumpet shape. The outer peripheral wall of the spacer ring 302 is provided with a mesh-like hollow. The spacer ring 302 has two functions. One is to block the flow of the fluid inside one end of the bushing, and the second is to indirectly connect the two bushings. During use, the rotating shaft 301 penetrates through the pump casing 202, the rotating shaft 301 is sleeved with one end of the bushing 1, and the impeller 3 in the pump casing 202 is connected to the bushing 1 with a ring end provided with a return groove 103, so that part of the fluid can enter the inside of the bushing 1 for cooling without flowing into the other bushing. The spiral directions of the spiral grooves 102 between the two groups of bushings 1 are opposite. Coupled with the blocking connection of the spacer ring 302, it can completely prevent the liquid in the grooves from communicating with each other, realizing the separation of the coaxial wet and dry sections. The other bushing 1 is connected to the magnetic rotation drive structure, and the cooling can be realized by using the rotating wind speed. The two bushings can be provided with other components for fixed connection with the inner housing 201 or other components, realizing the stable rotation and fixing effects on different sections of the rotating shaft (this is the original fixing function of the bushing), which will not be elaborated here.

[0025] Reference Figure 3, the spiral grooves 102 between the two sets of shaft sleeves 1 have opposite spiral directions, which completely realizes the segmented connection of the dry and wet shafts. The shaft sleeve 1 is made of tetrafluoro graphite, and the pump casing 201, the outer casing 2, and the inner casing 202 are all made of non-magnetic stainless steel.

[0026] The working principle of the new structure of the shaft sleeve 1 to optimize the cooling effect of the graphite shaft sleeve of the existing magnetic pump: Refer to Figure 3 and Figure 1 , this device utilizes the frictional force between the rotating shaft 301 and the fluid to bring part of the fluid into the spiral groove 102. The spiral groove 102 enables the fluid attached layer rotating with the rotating shaft 301 to move axially along the shaft sleeve 1, and finally the flow is stopped by the packing ring 302, and then the rotation drives the liquid ring to flow. Because the impeller drives different fluids, in this way, it realizes the continuous circulation of the fluid between the shaft sleeve 1 and the rotating shaft 301 at one end, improving the heat dissipation efficiency of the rotating shaft 301 and the shaft sleeve 1.

[0027] The shaft sleeve used in this pump is provided with an annular return groove structure at one end. When in use, the seat end with a ring shape is used to connect with the component close to the fluid, so that the fluid can flow in by the inlet type according to the notch part, and will not flow in with a large impulse, avoiding causing another rotational resistance force. And it utilizes the frictional force between the rotating shaft and the partially diverted fluid to bring the fluid into the spiral groove. The spiral groove enables the fluid attached layer rotating with the rotating shaft to move axially along the shaft sleeve, and finally reaches back and forth circulation through the return groove and the movement of the rotating shaft. The fluid driven by the impeller continuously circulates between the shaft sleeve and the rotating shaft at one end, enabling the shaft sleeve to not only realize the fixing function of the shaft, but also realize the heat dissipation efficiency of the rotating shaft and the shaft sleeve; and the overall of the two shaft sleeves arranged oppositely and connected by the packing ring effectively blocks the fluid inside one end shaft sleeve, and is also the fixed connection of different segments of the two shaft segments, and enables the rotating shaft to completely realize dry and wet segmentation.

[0028] The design principle of the magnetic pump using this shaft sleeve first realizes the separated drive of the motor by the pump body and the magnetic drive structure. And the structure of the double shaft sleeves arranged oppositely and intermittently connected by liquid to the shaft optimizes the working conditions of the fixing and heat dissipation of the rotating shaft and the shaft sleeve. At the same time, it further increases the dry and wet separation of the shaft segments inside the pump. One shaft sleeve utilizes a very small amount of flowing liquid for cooling, avoiding the high temperature caused by friction, and at the same time avoiding the complete inflow of the liquid from affecting the effect of the magnetic drive. The other shaft sleeve can also realize cooling by using the rotating wind speed of the magnetic drive. The use of the two shaft sleeves plays a role in stabilizing the rotation, effectively dissipating heat, and realizing complete dry and wet separation segments for the rotating shaft of the magnetic pump, and the overall structure greatly enhances the use of the magnetic pump.

[0029] The rotating shaft 301 connected with the inner rotating cylinder 303 is provided with spaced fixing blocks 203 connected to the shaft sleeve 1, which can realize the fixed connection function, and at the same time further prevent the liquid from entering the magnetic drive structure part along with the rotation of the shaft sleeve.

[0030] The described spiral grooves 102 are distributed in multiple groups in an annular array with respect to the bushing 1, and the groove profile of the spiral grooves 102 is U-shaped to increase its heat dissipation area.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A wet-dry segmented rotating shaft, comprising a rotating shaft (301), characterized in that, The rotating shaft (301) is rotatably sleeved with a bushing (1). Both ends of the bushing (1) are annularly protruded with clamping seats (101). The inner wall of the bushing (1) is spirally provided with a spiral groove (102). And a return groove (103) is provided in the clamping seat (101) at one end of the bushing (1) corresponding to the spiral groove (102). The return groove (103) communicates with the spiral groove (102). The return groove (103) is arranged in a semi-notch shape along the edge of one end clamping seat (101), and the notch is arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge. There are two bushings (1), which are arranged oppositely and connected. A spacer ring (302) is arranged between the two bushings (1). Both ends of the spacer ring (302) are open and in a horn shape. The outer peripheral wall of the spacer ring (302) is provided with a mesh-like hollow.

2. A wet and dry segmented rotating shaft according to claim 1, characterized in that, Multiple groups of the spiral grooves (102) are annularly arrayed with respect to the bushing, and the groove shape of the spiral groove (102) is U-shaped.

3. A wet and dry segmented rotating shaft according to claim 2, wherein, The spiral directions of the spiral grooves (102) between the two bushings (1) are opposite.

4. A dry-wet segmented rotating shaft according to claim 3, characterized in that, The bushing (1) is made of graphite material.

5. A wet and dry segmented rotating shaft according to claim 4, characterized in that, It further includes an impeller (3) and a motor (4). The impeller (3) is sleeved with a pump casing (202). And one end of the pump casing (202) far from the feed inlet is connected with a housing (2). An inner housing (201) is sleeved in the housing (2). The impeller (3) is provided with a rotating shaft (301) along its axial direction. And the rotating shaft (301) is rotatably sleeved with the bushing (1) in the inner section of the inner housing (201). The end of the rotating shaft (301) is connected with an inner rotating cylinder (303). An inner magnetic block (304) is fixedly attached to the outer wall of the inner rotating cylinder (303). And an outer rotating cylinder (401) is sleeved between the inner housing (201) and the housing (1). An outer magnetic block (402) is fixedly attached to the inner wall of the outer rotating cylinder (401). And the output end of the motor (4) penetrates through the housing (2) and is coaxially connected with the outer rotating cylinder (401). The inner magnetic block (304) and the outer magnetic block (402) are correspondingly adsorbed.

6. A wet-dry segmented rotating shaft according to claim 5, wherein, The inner rotating cylinder (303) and the rotating shaft (301) are coaxially arranged. And the inner magnetic block (304) and the outer magnetic block (402) correspond to each other and are annularly arrayed with respect to the rotating shaft (301).

7. A wet and dry segmented rotating shaft according to claim 6, wherein, The pump casing (201), the housing (2), the impeller and the inner housing (202) are all made of non-magnetic stainless steel material.

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